If you are looking for a low cost and environmentally friendly cooling option for your home, evaporative coolers are the ideal choice. They cool the air by using water evaporation and a fan to produce a cool breeze. The warm air is drawn into the cooler and passes through a wet honeycomb like filter. This filter absorbs the heat and the fan then pushes the cool air out into the room.
Evaporative coolers are a natural cooling system which does not use compressors.
These types of coolers work best in areas which have 60% humidity or less. They need a supply of warm, dry air to cool a room effectively. Areas with dryer air will have a more noticeable temperature change as higher evaporation happens when there is low humidity.
Evaporative coolers are more than just a fan. They are not air conditioners. Air conditioners use a chemical cooling agent and a compressor to cool the air. Air conditioners need an outlet to release the hot air and they use far more energy than evaporative coolers.